Based on lase, new words formed by adding one letter at the beginning or end:
b - aels c - bales d - blase e - alecs f - laces g - scale h - dales i - deals k - lades m - lased n - leads o - easel p - lease r - alefs s - fleas t - gales v - hales w - heals x - leash y - selah z - shale